Blastoise is a Water-type Pokémon introduced in Generation I. It is listed as #009 in the Pokédex and known as the "Shellfish Pokémon". Blastoise evolves from Wartortle at level 36, which in turn evolves from Squirtle at level 16. As of Generation VI, it is also capable of undergoing Mega Evolution.

Hydro Pump is a Water-type move with 110 base power (120 in Generations I-V) and 80% accuracy. Blastoise and its pre-evolved forms learn it naturally by level up.

Blastoise makes its first appearance as a Poké Ball Pokémon in Super Smash Bros. Blastoise uses Hydro Pump as its attack. It stations itself on the stage and starts firing blasts of water from the cannons on its back. Any character that makes contact with the blasts of water will take moderate damage. The character will also be pushed towards one side of the screen. Characters that are on the other side of Blastoise will not be affected unless that person makes contact with Blastoise itself, which will then cause him or her to take moderate to high damage. Blastoise also moves back slightly for each blast of water and can fall off the stage if close enough to the ledge.

Blastoise reappears as a Poké Ball Pokémon in Super Smash Bros. Melee. Like in SSB, it uses Hydro Pump as its attack. Oddly, CPU-controlledFox and Falco will try to reflect Hydro Pump in spite of it being immune to reflection-based hitboxes. Other CPU-controlled characters will try to counter the attack with their shields as well. Additionally, it fires faster than in SSB and does not push itself back as far.

Blastoise appears as a collectible trophy, unlocked as one of the 100+ trophies that can be collected randomly during normal play, such as in the Trophy Lottery and throughout the various Single-player Regular Matches.

Blastoise is the next evolutionary step from Wartortle. The thick jets of water they shoot from the cannons on their backs are strong enough to cut through steel plating. When in danger, they hide inside their armored shells. Blastoise is so popular among trainers it's considered the definitive water type.

According to an interview with Masahiro Sakurai, Blastoise was briefly considered as a possible playable character before it was switched out for Squirtle, because he thought having balance with the sizes and stages of evolution would be interesting.[1]

On a hot summer day, it's great to cool off by playing in a sprinkler. Don't look to Blastoise as a replacement, though - those water jets on its back are extremely powerful and would send you flying. In fact, Blastoise itself is so huge so it doesn't get blown away when it fires. Speaking of fires, Blastoise is better than a fire truck at putting them out!

Tempted to have a Blastoise hose the mud off your bike? Well, don't. The water jets from its rocket cannons might look perfect for that, but they'd just blast your bike into oblivion. In fact, the reason Blastoise grow so big and heavy is so they don't get blown away themselves. If your house is on fire, though, feel free to get a Blastoise to help!

Some species of Pokémon living in Kalos have the ability to Mega Evolve, and here's one! Mega Blastoise is a bit bigger than Blastoise, and instead of two cannons on its shell, it has one huge cannon. This may seem like a downgrade, but wait—there are two on its arms! This math is easy: three is better than two.

Some species of Pokémon living in Kalos have the ability to Mega Evolve, and here's one! Mega Blastoise is a bit bigger than Blastoise, and instead of two cannons on its shell, it has one huge cannon. This may seem like a downgrade, but wait—there are two on its arms, too! Basic arithmetic: three is better than two.